A diffraction-based optical method for the detection of in-plane motion of Lamb waves

Che Hua Yang; Yua Ching Tsai

doi:10.1109/TUFFC.2005.1509796

A diffraction-based optical method for the detection of in-plane motion of Lamb waves

Che Hua Yang^*, Yua Ching Tsai

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Contribution to journal › Journal Article › peer-review

Abstract

This paper describes a laser optical technique that allows the detection of in-plane motion of Lamb waves. This interference-based laser optical technique includes a tiny square indentation with a width of about 30 μ, on the sample surface and a relatively simple optical arrangement. The current technique is applied for the detection of in-plane motions of Lamb waves propagating in a 70-μ thick brass plate. Measurement of S_o mode dominated by in-plane motion in the low f d (frequency times thickness) regime is successfully demonstrated with the current technique. With the indentation replaced by a microreflector in a microelectromechanical (MEMS) structure, this technique is applicable for the detection of in-plane motion in MEMS structures.

Original language	English
Pages (from-to)	1372-1377
Number of pages	6
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	52
Issue number	8
DOIs	https://doi.org/10.1109/TUFFC.2005.1509796
State	Published - 08 2005

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title = "A diffraction-based optical method for the detection of in-plane motion of Lamb waves",

abstract = "This paper describes a laser optical technique that allows the detection of in-plane motion of Lamb waves. This interference-based laser optical technique includes a tiny square indentation with a width of about 30 μ, on the sample surface and a relatively simple optical arrangement. The current technique is applied for the detection of in-plane motions of Lamb waves propagating in a 70-μ thick brass plate. Measurement of So mode dominated by in-plane motion in the low f d (frequency times thickness) regime is successfully demonstrated with the current technique. With the indentation replaced by a microreflector in a microelectromechanical (MEMS) structure, this technique is applicable for the detection of in-plane motion in MEMS structures.",

author = "Yang, \{Che Hua\} and Tsai, \{Yua Ching\}",

year = "2005",

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doi = "10.1109/TUFFC.2005.1509796",

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AU - Tsai, Yua Ching

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AB - This paper describes a laser optical technique that allows the detection of in-plane motion of Lamb waves. This interference-based laser optical technique includes a tiny square indentation with a width of about 30 μ, on the sample surface and a relatively simple optical arrangement. The current technique is applied for the detection of in-plane motions of Lamb waves propagating in a 70-μ thick brass plate. Measurement of So mode dominated by in-plane motion in the low f d (frequency times thickness) regime is successfully demonstrated with the current technique. With the indentation replaced by a microreflector in a microelectromechanical (MEMS) structure, this technique is applicable for the detection of in-plane motion in MEMS structures.

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JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

IS - 8

ER -

A diffraction-based optical method for the detection of in-plane motion of Lamb waves

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